Completely Deadpan. They may not even crack a smile because they've heard every joke before. They're usually already this type when they're first introduced, and their experience is implied rather than witnessed. They're notDeadpan Snarkers; they have the deadpan, but their wording is completely serious.
Weary Traveler. We've seen this character go through hell and back, and can understand their sigh of boredom when the most bizarre things happen. This character may be a Deadpan Snarker, and mildly Genre Savvy. It may be a defense mechanism to deal with all the weird crap they keep going through.
Smug Know-it-all. Take the Weary Traveler, but instead of a tired and deadpan reaction to repeat weirdness, they'll smugly say that they knew it would happen, and are disappointed that the event was so predictable. This type is generally reserved for wisecracking heroes (or their sidekicks) or Large Ham type villains who disdain the hero's predictable motivations.
Evangeline of Mahou Sensei Negima!, an ancient vampire (born circa 1400), fits into type 2: the existence of a time-travelling device impresses her somewhere below the level of a shrug or a nod. She says that overall the ability to travel to the moon, the telephone, and the internet surprised her far more when they first appeared. She occasionally slips into type 3.
Keiichi from Ah! My Goddess. Especially the first movie. A girl kisses him, grows wings, and jumps out the window and flies away and he doesn't even blink.
Kyon, from Haruhi Suzumiya. He even complains in his head that weird stuff is normal to him now.
Maiza Avaro from Baccano! is a type 2 example, both because of some traumatic experiences and because he's been around long enough to have seen it all.
In Durarara, Kasuka Heiwajima's deadpan Stoicism never lets up even in the worst or most ridiculous of situations. Oddly enough it doesn't seem to have been caused by growing up with Shizuo, a Person of Mass Destruction, as a brother, since he had the deadpan expression even when Shizuo first lifted a fridge to try and crush him.
A similar example in Steins Gate: Okabe claims that his endless time-leaping to save Mayuri have so desensitized him to the event that he feels nothing, even when he lets her die to find out the circumstances. Kurisu knows it isn't true.
"Calm down everyone; it's nothing we haven't seen before."
One of the funnier works to come out of the Civil War storyline was the Fantastic Four's Ben Grimm going to Paris. When The Heroes of Paris urgently enlist his aid, he quips in a weary type 2 tone (paraphrased) "What is it? Skrull impostors? A Super Registration Act? A mind controlled clone army?" The French heroes just look at each other in confusion and say no, it's the "Underground Emperor" who wants to collapse Paris by tunneling beneath it. His only response is a teary-eyed "I love Paris".
The citizens of Metropolis and Central City tend to be this. The citizens of Gotham, on the other hand, are much less savvy than would be expected, although the police force falls closer to this trope.
Nick Fury is nearly a hundred years old, has been through three wars (World War II, Korea, and Vietnam), been through paratrooper school, demolition training, trained with the Army rangers and the Green Berets and worked for the CIA. This was all before he joined SHIELD
Roxanne in Megamind is the smug type, she's the go-to Damsel in Distress and is rescued on a regular basis so that nothing really bothers her. That said, the events of the film go Off the Rails from the norm and everyone gets thrown off.
Agent K is the primary example of the type 1 version. He monitors and fights aliens from around the universe; what we consider weird, he considers just another day on the job.
J turned into a type 2 in the second film. By this point he's no longer a rookie and the flashy thing is no longer a novelty.
Z is also a type 1, possibly even more than K.
Agent Simmons from the Transformers movie. Optimus Prime even noted that they weren't surprised to see the Autobots, they just didn't expect them to show up. He does seem to be surprised at one thing in the sequel though; that Wheelie has been somehow "tamed" by Mikaela.
Simmons: All my life I've been searching for aliens. And you've got one tied on a leash like a little Chihuahua.
The Curious George movie features a cab driver who claims to have seen it all in New York, even a giant monkey wreaking havoc in the streets. At the end he sees a giant jungle idol in the museum and says, "I haven't seen that before... and now I have."
In the Signature Scene of the 1980's blockbuster film Crocodile Dundee, the titular character and his love interest are held up at knife point by some New York City thugs wielding switchblades; instead of being frightened and bartering for their lives to be spared, he simply pulls out a Bowie knife and calmly proclaims, "That's not a knife. Now, that's a knife." Then the thugs run away in terror.
Groundhog Day uses the Weary Traveler to great effect. Phil Connors finds himself stuck in Punxsutawney, Pennsylvania and reliving Groundhog Day every single time he wakes up. He kills himself multiple times, but each time he wakes up at 6:00 am like nothing happened. Eventually, he decides to use his situation for good and he takes to memorizing the events of the day and getting to know everyone in the town. This eventually leads to him obtaining a vast knowledge of everything that happens and everyone in the town.
Agent Coulson, a top agent for S.H.I.E.L.D., appears to have this experience. He's very calm and flat in his demeanor around others, even if they happen to be demigods or monsters of science gone wrong. When he has to call one of his agents, who is currently playing possum in order to get some info from some criminals, she audibly cleans house on her captors over the phone while he nonchalantly waits for her to finish, as if on hold and listening to filler music. Notably, this trait is a case of Character Development throughout the entire Marvel cinematic universe. In his first apperance in Iron Man, he was rather nervous and unsure of himself. Each subsequent film added more and more to his confidence until he's killed by Loki in The Avengers. Though he does get off a very nice Pre-Mortem One-Liner before he goes.
There's also a scene in The Restaurant at the End of the Universe where Zaphod tells a Megadodo Publications desk clerk, "Don't you try to outweird me, three-eyes, I get stranger things than you free with my breakfast cereal."
And of course Arthur Dent himself eventually becomes this.
Detective Inspector Jack Spratt of Jasper Fforde's Nursery Crime series. Years of dealing with crime among Reading's population of Nursery Rhyme characters means that he hardly bats an eyelid over prosecuting the Three Little Pigs for killing the "Big Bad" Wolf, or investigating who killed Humpty Dumpty.
G. K. Chesterton's Father Brown, a little round priest who has seen it all, and somehow forgiven everyone. In his first story, "The Blue Cross," when the great thief Flambeau waylays him, Father Brown has seen it coming, and has already outsmarted Flambeau before the finale. He has planned out counters for techniques so criminal and horrific that even Flambeau is shocked. The man is Crazy-Prepared.
The man, as he points out himself, sits in the confessional, and listens to people telling him about the horrible things they do. He's not likely to be naive. (Indeed, Chesterton was inspired to create the character after overhearing two Cambridge students commenting on the "innocent and ignorant" life of a priest — who happened to be Chesterton's friend and earlier that day had been talking with him about the horrors of crime.)
Robert E. Howard's Conan has traveled from the frozen wastes of Asgard and Vanaheim to the southern jungles, from beyond the Barachan isles in the west to Vendhya in the east, has been a thief, a mercenary, a pirate, a tribal chieftain (of four different tribes in four different parts of the world) and a general all around adventurer before becoming king by his own hand and has fought sorcerers, demons, apemen and giants and discovered lost cities.
Lucy from Someone Else's War has this attitude, along with an air of general defeat, a direct result from having spent her entire life with the Lord's Resistance Army as an unwilling captive.
Wizards eventually develop into this. Harry faster than others — but that's because he's on the frontline more. It's remarked that (in his 40s-50s, barely a child by wizard standards) he's seen as much as people several times his age. A wizard's Sight not only lets him see the truer nature of things, but never lets him forget it. They will always have the memory, perfectly clear, and even thinking about the subject can trigger a re-viewing.
At one point, Harry encounters a true Eldritch Abomination that preys on fear. When he gets to safety, he meditates and reviews all of the myriad horribly ugly and terribly beautiful things he's seen with his Sight, reminding himself that he fits this trope so that he can return to the fight. Later, he muses that he's seen so much that even remembering seeing that monster with his Sight only gives him slight pause now.
At one point, an Entropy Curse guided by someone with a really twisted imagination and ham-fisted flair for the dramatic tried to kill someone with a frozen turkey falling from an airplane and spearing the target. The target, Harry, and a bunch of Black Court Vampires were brawling it out, and when the turkey hit, the whole fight stop. As Harry pointed it out, even the nigh-immortal supernatural world can't have truly seen it all.
A variation of this leads to a CMOA: Harry is able to utterly pwn Nicodemus and almost strangle him to death because he went through so many hard beatings that in their struggle Nick, with all his experience, cannot hurt him enough to make him let go.
What has been will be again, what has been done will be done again; there is nothing new under the sun.
Michael Weston from Burn Notice is type 2. He always knows what to do when things go wrong, he just doesn't know when they'll go wrong.
An argument can be made that Claude Rains, the invisible man from Heroes, is a type 2 version of this. He's a former Company Man in Black, invisible, and he has alluded to a hobby of randomly following people around, so he's seen a lot.
Claude: People suck, friend! Never forget that!
Claude: Everyone's like the rest — that's why they're the rest!
Everybody in the later seasons of Stargate SG-1, possibly the most Genre Savvy group of heroes this side of the Discworld. At one point, General Hammond believes Daniel's claim that he has intelligence information from a dream he had, and explains his credulity with, "The things I've heard sitting in this chair..." Keep in mind he's talking to someone who's died, Ascended to a Higher Plane of Existence, and then came Back from the Dead, twice. This trope is nicely lampshaded when the other team members express surprise at Daniel's immediate belief in a teenager who claims to be their teammate Jack, somehow youthened about 30 years in his sleep for no apparent reason, in "Fragile Balance."
Daniel: Stranger things have happened. Teal'c: Name but one. Daniel Jackson: Well, there was the time he got really old; the time he became a caveman; the time we all swapped bodies....
Then there's Bon-Chance Louis of the short lived and much regretted Tales of the Gold Monkey who owed his name to having overslept his appointment with the guillotine and dropped little remarks implying he'd been everywhere and done everything.
The reapers of Dead Like Me are, unsurprisingly, not fazed in the least by the deaths they witness every day, and don't even react to the many Necro Non Sequiturs with any more than a deadpanned "damn."
Played with on The Upright Citizens Brigade. One episode featured an ongoing thread in which various couples keep looking at a great house for sale, only to be driven mad after looking into the bucket!!. Another plot thread involved a grizzled Defective Detective. When his case eventually brings him to the house he looks in the bucket, looks up at the sky and yells "Don't you think I know that!"
Sometimes happens in later seasons of Star Trek series. When something odd happens, they promptly check for everything odd that's happened before, up to and including parallel universes and time travel. "This is Starfleet. Weird is part of the job."
In Doctor Who the Doctor has spent the last 900+ years of his life travelling anywhere in space and time, and has been to (and saved) possibly billions of planets. He swings between a Type 2 and 3, Depending on the Writer and the incarnation.
Amy: Why am I here? The Doctor: Because... I can't see it anymore. I'm 907, and after a while you just can't... see it. Amy: See what? The Doctor: Anything. I look at a star, and all I see is a big ball of burning gas. And I know how it began and how it will end. And I was probably there both times. And after a while everything is just stuff. And that is the problem: You make all of space and time into your back yard, and what do you have? A back yard! But you, you can see it. And when you see it, I see it. Amy: And that was the only reason you took me with you? The Doctor: ...There are worse reasons.
Ten and Eleven turn into Doctor-y balls of squee when something they haven't seen before pops up.
The writers of Supernatural like to lampshade the main characters' casual professionalism every now and then.
One example is the fourth season episode "Death takes a Holiday", where the Winchesters discuss what they know of their latest case (a Town of the Week where everyone is suddenly immortal):
Sam: It seems like the last person to actually die around here was this boy a couple of months ago; we should probably start by contacting him. (beat) Dean: ...I love how matter-of-factly you just said that. Our lives are weird.
Another example is when they travel back in time to the 1800s because they need the help of veteran hunter Samuel Colt (yes that Samuel Colt). Upon Sam meeting him, and proving who he is with his cell phone, Colt is completely unfazed; when questioned on it, he says "When you've done this job as long as I have, a giant from the future with some magic brick doesn't exactly give you the vapours."
The crew of Moya on Farscape are firmly in Type 2 territory. Crichton even lampshades it in one episode when he refers to aliens messing with their minds as "pulling a T'raltixx," in reference to a previous mindscrew. Scorpius is somewhere between a Type 1 and Type 3. Nothing fazes him. Ever.
The song "I've Seen It All" from Dancer In The Dark, sung by the main character, who's going blind.
Sadly, a recurring problem is challenging PCs whose players have Seen It All, especially if the Game Master hasn't.
The GURPS advantage Unflappable tends to turn you into this, especially when combined with Weirdness Magnet.
In Knights of the Old Republic, Canderous Ordo, after The Reveal, makes a comment that, "Remember, we're talking about the Force here. At any moment, Malak could fall from the sky and I wouldn't bat an eyelash."
Happens a lot to anyone playing any MMORPG, due to the anonymous nature of the users. Anyone can say anything they want, and do, e.g. "I hope your (loved one) gets (expletive) and (action) down the (undesirable region)". Hence being called anything in the real world would perhaps earn an lol from any experienced MMO veteran.
Shepard: Be ready. I wouldn't be surprised if this summoned a Reaper.
Liara: How many guards does the Shadow Broker have? Shepard: Told ya.
In Mass Effect 3, Mordin is a former special forces soldier and one of the galaxies leading bio-engineers in the field of advanced bioweapons, was a member of a theatre group that played old human musicals, and ran a free hospital in the worst slum of a backwater pirate haven after retirement, which he left behind to fight million year old cybernetic abominations in the galactic core. There really isn't much that he has not seen or done. His completely deadpan response to seeing Javik, who comes from a long extinct race, says it all:
Leon Kennedy in Resident Evil 4 has a Type 2 moment partway through the game. After one of the villains undergoes a dramatic One-Winged Angel transformation and emerges as an enormous monster, Leon scoffs "Monsters. At least after this, there'll be one less to worry about."
Especially in Resident Evil 6. Just before he, Helena, Jake and Sherry fight the Ustanak, he tells him "Welcome to the club. You get used to it."
All four of the characters in Left 4 Dead are like this, which is shown in detail in the comic, where they constantly have to explain things to the (in theory better trained) CEDA officers. Left 4 Dead 2 shows the new characters gradually becoming this.
The immortaldeadpanloli Rachel Alucard from BlazBlue begins the series with a serious case of Seen It All-inspired boredom, owing partially to her age and partially to the fact that she has literally seen it all before, and she may well be subjected to it all again if you select "Continue" one more time, you sadist.
Antimony was practically raised by The Guides, so she's almost completely unfazed by the supernatural. For example, compare Kat's reaction to Ketrak with Annie's complete lack of a reaction.
Jones, also. Apparently the fact that she has only seen something similar is greatly disturbing.
While he didn't start off as this, there's Jack. His only response to a really pissed-off Reynardine is "Oh... you have a, uh, large wolf with you. Okay. Cool. Nice flowers." He was visibly startled, but he took it in stride.
Sarda is a type 2. He has literally seen everything that ever happened or ever will happen. He has learned every bit of magic ever. You can't beat him, though you can (very rarely) surprise him with extreme stupidity.
By the end of the comic, Black Mage, Thief and Red Mage had become type 2s. They had even become aware of the basic jokes of the comic and could see them coming.
Sha'sana of Drowtales is one of the few surviving Dark Elves and combines several different types, showing very little expression, weariness at what the drow have become, and a certain smugness about the impending disaster of nearly every tainted drow in Chel losing control of her seeds while keeping Sharess' body in the Ninth Tower that made many fans dislike her.
Jonah Hex is portrayed this way in Justice League Unlimited, where he not only isn't surprised by a group of time traveling superheroes from the future, but he instantly figures it out. To a lesser extent, a bit earlier in Batman The Animated Series. This bit of dialogue highlights it:
Jonah Hex: Fancy gun belts you've got there. I'm thinking you folks are time travellers. Batman: Where would you get a crazy idea like that? Jonah Hex: Experience. I've had an interesting life.
In the same episode, Green Lantern thinks he is, but gets proven wrong.
Smith: Be careful — there are some of the strangest things down at that ranch. Green Lantern: Don't worry, we've got a lot of experi... (pterodactyl screeches overhead) I'm sorry, what were you saying?
Jonah's no more fazed in Batman The Brave And The Bold, where being in the future on an alien world, being forced to track down various species to fight, doesn't warrant much surprise. Batman's no stranger either, and seems to take time travel, galactic teleportation and mystic outer planes in his stride.
Grimm seems to be a great example of this. There's the way he defeated Horror's Hand in one of the movies, and this quote:
Billy: This is scary! Let's watch something else! (turns off the TV) Grimm: Aw, come on! I've seen scarier stuff in your toilet!
Mandy is this in spades, and is even immune to irritation (as revealed in the episode with the invisible duck) due to being constantly exposed to Billy's pure stupidity infused antics, which drove the goddess of chaos (Eris) insane.
Most of the characters are this, with Dr Venture being a very tired type 2; Brock alternating between type 1 and type 2 depending on his mood; Hank bragging about his experiences putting him into type 3; and Dean growing from an enthusiastic type 3 into a very scared type 2.
On the villain side of things, The Monarch is a type 2, Dr Girlfriend is a rare type 1, Phantom Limb is a type 3, #21 is a type 2 and #24 is a wannabe type 3. Honestly, Jonas Jr. sticks out because he's one of the few characters who isn'tGenre Savvy enough to be a Seen It All at all.
Skips in Regular Show says "(yeah,) I've seen this before" in response to anything.
South Park sees so many strange things that nobody bats an eye at anything short of the entire town being destroyed. A good example is in the episode "Mr. Garrison's Fancy New Vagina":
Slappy Squirrel from Animaniacs is a combination of type 1 and a highly sarcastic type 2. She's seen so much that's she Genre Savvy nearly to the point of being all-knowing, and practically no-one she's pitted against has a chance of posing her a serious problem.
There is absolutely nothing you can confess to an experienced priest that they haven't heard before (with "experienced" meaning "has been in the Church for several decades"). The guidelines for conduct of Mass say that, during a specific part of the Communion, stopping is not allowed. Thus, there is a manual required to be read prior to ordination. It includes everything from a fly landing on the Host to gunmen taking hostages. It's mostly drawn from experience.
Some people who've worked in tech support have heard it all.
Master chess players are so good primarily because they have seen everything that could come up in a chess game.